Toyota recommends that you use a Refrigerant and Combustible Gas Electronic Leak Detector to check for system leakage. Stop the engine and secure good ventilation (If not, the gas leak detector may react to volatile gases witch are not refrigerant, such as evaporated gasoline and exhaust gas.) Repeat the test procedure 2 or 3 times. Make sure that there is some refrigerant remaining in the refrigeration system before beginning.
- Bring the gas leak detector close to the drain hose before performing the test. After the blower motor stopped, leave the cooling unit for more than 15 minutes. Expose the gas leak detector sensor the under the drain hose.
- If gas leak is not detected on the drain hose, remove the blower resistor from the cooling unit. Then insert the gas leak detector sensor into the unit and perform the test.
- Disconnect the connector and leave the pressure switch for approx. 20 minutes. Then bring the gas leak detector close to the pressure switch and perform the test.
- Bring the gas leak detector close to the refrigerant lines and perform the test.